I think you can use python itself for pre-processing. Here is an
(shortened) example from PyPy RPython paper:
# operators: the docstrings contain the
# symbol associated with each operator
class Op_Add(BinaryExpr):
’+’
class Op_Sub(BinaryExpr):
’-’
# INIT-TIME only: build the table of
#
How about
page, index = divmod(address, 16384)
Surely, much better and faster :-)
Thanks a lot.
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I'm going to quote all the answers in a single post, if you all don't
mind:
[greg]
But keep in mind that named constants at the module level
are really global variables, and therefore incur a dictionary
lookup every time they're used.
For maximum speed, nothing beats writing the numeric
En Thu, 12 Nov 2009 23:29:03 -0300, greg g...@cosc.canterbury.ac.nz
escribió:
Carl Banks wrote:
You
can define constants to access specific registers:
R1L = 1
R1H = 2
R1 = 1
breg[R1H] = 2
print wreg[R1]
But keep in mind that named constants at the module level
are really global variables,
Try creation an extension module with ShedSkin.
Bye,
bearophile
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Santiago Romero wrote:
Can the above be easily done with another already-existing
application? (example: can m4 do this job)?
The problem you're going to have with something like
m4 is indentation. When you inline a function call,
somehow the inserted code has to be shifted to the
same
Hi.
I'm trying to port (just for fun), my old Sinclair Spectrum emulator,
ASpectrum, from C to Python + pygame.
Although the Sinclair Spectrum has a simple Z80 8 bit 3.5Mhz
microprocessor, and no aditional hardware (excluding the +2/+3 model's
AYsound chip), I'm not sure if my loved scripted
On Nov 12, 4:35 am, Santiago Romero srom...@gmail.com wrote:
Hi.
I'm trying to port (just for fun), my old Sinclair Spectrum emulator,
ASpectrum, from C to Python + pygame.
The answer to your question is, Use numpy. More details below.
[snip]
Should I start writing all the code with a
I'm trying to port (just for fun), my old Sinclair Spectrum emulator,
ASpectrum, from C to Python + pygame.
The answer to your question is, Use numpy. More details below.
Let's see :-)
How can I implement this in Python, I mean, define a 16 byte variable
so that high and low bytes
Santiago Romero wrote:
I'm trying to port (just for fun), my old Sinclair Spectrum emulator,
A
snip
Do you mean:
page =ddress / 16384
index =ddress MOD 16384
?
Or, better, with:
page =ddress 14
index =ddress 16383
?
snip
How about
page, index = divmod(address,
You can do clever memory slicing like this with numpy. For instance:
breg = numpy.zeros((16,),numpy.uint8)
wreg = numpy.ndarray((8,),numpy.uint16,breg)
This causes breg and wreg to share the same 16 bytes of memory. You
can define constants to access specific registers:
What I'm doing
Oops, numpy arrays start with index=0 :-)
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Santiago Romero wrote:
How about
page, index = divmod(address, 16384)
Surely, much better and faster :-)
Not necessarily, because it involves a function call,
and constructing and deconstructing a result tuple.
If you time them, you may well find that the explicit
shift and mask
On Fri, 13 Nov 2009 15:29:03 +1300, greg wrote:
Generally, I think you're going to have quite a battle on your hands to
get a pure Python implementation to run as fast as a real Z80, if it's
even possible at all. And if you do succeed, the code will be pretty
awful (due to things such as not
On Fri, 13 Nov 2009 15:33:53 +1300, greg wrote:
Santiago Romero wrote:
How about
page, index = divmod(address, 16384)
Surely, much better and faster :-)
Not necessarily, because it involves a function call, and constructing
and deconstructing a result tuple. If you time them, you may
Carl Banks wrote:
You
can define constants to access specific registers:
R1L = 1
R1H = 2
R1 = 1
breg[R1H] = 2
print wreg[R1]
But keep in mind that named constants at the module level
are really global variables, and therefore incur a dictionary
lookup every time they're used.
For maximum
On Nov 12, 6:37 am, Santiago Romero srom...@gmail.com wrote:
I'm trying to port (just for fun), my old Sinclair Spectrum emulator,
ASpectrum, from C to Python + pygame.
The answer to your question is, Use numpy. More details below.
Let's see :-)
How can I implement this in
On Nov 12, 6:29 pm, greg g...@cosc.canterbury.ac.nz wrote:
I would be taking a different approach -- develop a prototype
in Python, concentrating on clarity rather than speed, and
later reimplement the core of the emulator as an extension
module, using Pyrex or Cython or otherwise.
But keep
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